This is a front-end for the Online Encyclopedia of Integer Sequences, made by Christian Perfect. The idea is to provide OEIS entries in non-ancient HTML, and then to think about how they're presented visually. The source code is on GitHub.
| n | a(n) |
|---|---|
| 1 | 108 |
| 2 | 12500 |
| 3 | 84375 |
| 4 | 337500 |
| 5 | 3294172 |
| 6 | 22235661 |
| 7 | 88942644 |
| 8 | 2573571875 |
| 9 | 10294287500 |
| 10 | 69486440625 |
| 11 | 277945762500 |
| 12 | 1141246682444 |
| 13 | 7703415106497 |
| 14 | 30813660425988 |
| 15 | 891598970659375 |
| 16 | 1211500426369012 |
| 17 | 3566395882637500 |
| 18 | 8177627877990831 |
| 19 | 24073172207803125 |
| 20 | 32710511511963324 |